China’s ambassador to the United States struck a firm tone Wednesday as President Xi Jinping prepared to leave for a Washington summit with President Donald Trump, writing in the People’s Daily that four “red lines”—Taiwan, democracy and human rights, development paths and systems, and development rights—cannot be challenged.

Ambassador Xie Feng said managing differences requires good faith and urged Washington to stop “fabricating pretexts” such as national security, economic imbalances, and forced labor to constrain China. A separate Zhong Sheng commentary in the same paper blamed “erroneous” U.S. perceptions and an unwillingness to drop “strategic competition” for recurring Sino-U.S. difficulties, while calling for continuity and honored commitments.

The summit agenda spans trade, artificial intelligence, and Taiwan. A U.S.-China trade arrangement reached last year is due to expire in November; UNGA-sideline trade talks Tuesday made little progress, according to multiple reports. After a May Beijing meeting, Trump said he was holding a roughly $14 billion Taiwan arms package in abeyance as a “very good negotiating chip,” drawing Chinese demands that weapons sales end. A senior Taiwan security official, speaking anonymously, told Reuters Beijing treats delays as a way to slow Taipei’s buildup while Chinese naval and coast-guard activity rises around Taiwan and nearby seas.

BBC and other outlets note AI has climbed the agenda amid security incidents and domestic U.S. pressure to regulate frontier systems, while Trump allies remain suspicious of deeper commercial deals. Accounts agree Xi’s visit is historic for this Trump term and that Taiwan arms timing is a live bargaining chip; they diverge on whether Washington will trade delayed sales for Chinese cooperation on trade or Middle East tensions, or whether red-line rhetoric mainly hardens Beijing’s public position before bilaterals begin.